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From "Dora Rajappan (JIRA)" <>
Subject [jira] [Commented] (MYFACES-3804) Use the same key in server side state saving for ajax requests
Date Mon, 04 Nov 2013 12:34:23 GMT


Dora Rajappan commented on MYFACES-3804:

I have opened a jira issue 3817 for state saving problem with ajax redirect. Once that is
fixed the view key fix automatically applies to redirect scenario. Shall I commit  this code.
This address when there is no key initially in client window mode and  an ajax request is

> Use the same key in server side state saving for ajax requests
> --------------------------------------------------------------
>                 Key: MYFACES-3804
>                 URL:
>             Project: MyFaces Core
>          Issue Type: Improvement
>          Components: JSR-344
>            Reporter: Leonardo Uribe
>         Attachments: ajaxviewkey.patch, ajaxviewkeytest.patch, ajaxviewkeytest2.patch
> The current code for server side state saving creates one key per request to store the
view state. This is ok, but it is not necessary for ajax requests. 
> The reason why is not necessary is because you can never go back to a page when using
ajax. If you are on page A and the current request is an ajax request and it returns to the
same page and the view is the same that the one that has been restored, the key or the token
sent does not need to change, what changes is the internal state of the view. From the client
side the page is the same. We can take advantage of this fact and just update the state stored
in SerializedViewCollection for the view. 
> The challenge here is detect when this strategy is applicable. For example, what happen
if there is an ajax redirect? It looks is a good idea for implement in 2.2, because it avoids
to store unnecessary information into session and optimize the use of each view slot. 

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